Valve cover



FIG. 1 is a perspective view of a valve cover showing our new design. The broken line showing of FIG. 1 is for illustrative purposes only and forms no part of the claimed design; it being understood that filtering face masks of other configurations may be used in conjunction with the valve cover of this invention;

FIG. 2 is a top view thereof;

FIG. 3 is a left side elevational view thereof; the right side elevational view being the same;

FIG. 4 is a bottom view thereof;

FIG. 5 is a front elevational view thereof; and,

FIG. 6 is a rear elevational view thereof. 

The ornamental design for a valve cover, as shown and described. 